Why is transparency not working on this transparent image texture
Try this setup.  Under User Preferences, under the Add-Ons tab, one option is Import Images as Planes.  This is based on the default setup, but with a metallic shader.  This should work, but only if you use Cycles Render.

Also, I see what you're trying to do with the image, and I know a way you can make the images look 3D from any angle through microdisplacement.  To do this, link the image to the displacement input of the Material Output node.  It is best to use a bump map for the purpose.  If you got the image online, there may be one already made.  Otherwise, use this tutorial at https://www.youtube.com/watch?v=c9Q6E59hVpU to create your own off of the original image using your own image editing software.  Tell us how it worked.

Anonymous